Improvement in drop-presses



UNITED STATES PATENT OEEtcE.

JOSEPH P. NOYES, OF BINGHAMTON, NEV YORK.

IMPROVEMENT IN DROP-PRESSES.

Specification forming part of Letters Patent N0. dated October 16, 1866.

To all whom it may concern.'

Be it known that I, JOSEPH l?. Novias, of Binghamton, in the county of Broome and State of New York, have invented a new and Improved Drop-Press; and I do hereby declare that the following is a full, clear, and exact description thereof, which will enable others skilled in the art to make and use the same, reference being had to the accompanying drawings, forming a partof this specifica tion, in which- Figure l represents a longitudinal vertical section of this invention, the line x x, Fig. 2, indicating the plane of section. Fig. 2 is a transverse section of the same, taken in the plane indicated by the line y y, Fig. 1.

Similar letters of reference indicate like parts.

This invention relates to a drop-press the hammer of which is guided between two uprights and suspended by a belt from a crank mounted on the end of a shaft, on which revolves loosely a hollow drum. This drum is rendered rigid with said shaft by the action of a lever-catch and shoe, which are arranged in the interior of the same, the shoebeing connected by a link with an arm extending from the shaft, and the lever-catch with the shoe by a pivot, in such a manner that when the drum turns in one direction the leverfcatch and shoe will bind on its inner surface and render the same rigid with the shaft, causing the hammer to rise by the action of the crank until said crank just passes its upper center. At that point the outer end of the lever-catch comes in contact with a spring-stop and the drum is released, allowing it to revolve independent of the shaft, and by pulling the spring-stop the shaftis freed andthe hammer drops. As the hammer rebounds, the levercat-ch and shoe immediately bind in the drum and the hammer begins to rise, and a droppress is obtained which can be operated with great convenience.

A represents a frame, of cast-iron or other suitable material, which forms the bearings for two shafts, B C. B is the drivingshaft, on which are mounted a pulley, D, and a pinion, E. Avbelt passing over said pulley irnparts to the shaft the desired motion.

The pinion E gearsin acogwheel, F, which turns loosely on the shaft O, and the hub of which forms a hollow drum, Gr, as clearly shown in Fig. l ofthe drawings. On one end of the shaft O is mounted the crank H, whichl somewhat in order to permit the hammer to` come down upon the surface of the anvil.

The cog-wheel F and drum G are rendered rigid with the shaft C by the combined action of a lever-catch, d, and shoe e, which are connected to each other by a pivot, f, which also connects the shoe c to one end of a link, g, the other end of which is pivoted to an arm, h, which extends from the shaft O, and which is rigidly connected to said shaft. The levercatch d is provided with a shoulder, t', (shown in dotted lines in Fig. 1,) and this shoulder bears against the inner circumference of the drum. If this drum is revolved in the direction of the arrow marked on it in Fig. '1, the shoulder i binds against its inner circumference 011 one side and the shoe c on the opposite side, thus relieving the shaft of all lateral strain, and the drum is rendered rigid with the shaft O, causing the hammer to rise in its guides until the crank H reaches its upper center. Immediately after the crank has passed its center the extreme end of the lever catch strikes the springstop K, and thereby the shoulder t' is thrown back and compelled to release the drum, which may continue to revolve in the same direction as before. The hammer I, being suspended in its highest position, can be made to drop at any moment simply by pulling the cord I, whereby the springstop K is caused to release the lever' catch, and as said hammer strikes the anvil or the article placed thereon it rebounds, and the shoulder i of the lever-catch binds against the inner circumference of the drum Gr, thereA by rendering said drum rigid with the shaft, and causing the hammer to rise before it is permitted to come down a second time upon the anvil or the article placed on the anvil.

This feature of my machine is a material adA vanta-ge, because in many cases, particularly where dies are used, the articles get slightly displaced by the first blow of the hammer, and

if the hammer is permitted to come down a second time the Work is spoiled, or at least injured.

The spring-stop K consists of an L-shaped rod of iron, the long arm ot' which is guided in a staple, m, While its short arm is perforatedwith a hole to receive the pin a, which slides in the frame A, and which is subjected to the action of a spring, o. rlhis spring has a tendency to draw the pin out, and by these means the long arm of the L-shaped baris raised, so that its end Will come in contact with the levercatch as the same turns round with the drum G. By pulling the cord Z the end of the L- shaped bar is depressed to such a position that it clears the lever-catch.

Itis obvious that instead of the L -shaped bar and its connections, aspring-stop of any other form or construction might be used, and I do not Wish to confine myself to the precise forni shown in the drawings.

The stroke of the hammer can be regulated by lengthening or shortening the belt c and shifting the wrist-pin b closer to er farther from the center of the crank-shaft C.

The great convenience of this machine will be readilyT understood by practical men, and requires no further explanation. It is simple in its construction, strong, durable, not liable to get out of order, and it can be put up in any locality Where suicient height can be attained.

What I cla-im as new, and desire to secure by Letters Patent, is-

1. The arrangement of the lever-catch d, shoe e, and arm h, in combination with the drum Gr, crank-shaft C, and hammer l, eonstrueted and operating substantially as and for the purpose described.

2. The spring-,stop K, in combination with the lever-catch d, drum G, and hammer I, constructed and operating substantially as and for the purpose set forth.

JOSEPH P. NOYES.

Witnesses H. Honour, JOHN B. BOWEN. 

